Add docs for using jq with SR_CONTEXT_RAW

[ffjlabo]

What this PR does / why we need it:

as tile

Which issue(s) this PR fixes:

Part of #4814

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.27%. Comparing base (f20a270) to head (7bd88f8).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5013      +/-   ##
==========================================
- Coverage   22.28%   22.27%   -0.01%     
==========================================
  Files         519      519              
  Lines       57284    57284              
==========================================
- Hits        12763    12762       -1     
  Misses      43495    43495              
- Partials     1026     1027       +1     

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[khanhtc1202]

LGTM